Showing papers by "Cochin University of Science and Technology published in 1986"
TL;DR: In this article, the development of a compact broadband microstrip antenna configuration is presented, which uses a number of parasitic elements which are gas-coupled to a driven patch.
Abstract: The development of a compact broadband microstrip antenna configuration is presented. The system uses a number of parasitic elements which are gas-coupled to a driven patch. The enhancement of bandwidth does not cause deterioration of the radiation pattern of the system.
37 citations
TL;DR: In this paper, it was found that oxidation and annealing of bismuth films in an oxygen-rich atmosphere always produced pure β-Bi 2 O 3 films, whereas oxidation and anealing in a oxygen-deficient atmosphere gave pure α-Bi O 3.
14 citations
TL;DR: In this article, a perturbative scheme for the determination of the bifurcation rate δ for a specific map, by extending Virendra Singh's method of evaluating the scaling factor α, was discussed.
Abstract: We discuss a perturbative scheme for the determination of the bifurcation rate δ for a specific map, by extending Virendra Singh’s method of evaluating the scaling factor α. The method is applied to a quartic map and the values obtained, α = 1.690781026 and δ = 7.23682924 are in good agreement with the numerically computed values reported in the literature. The perturbative approach is found to be more efficient than other existing methods.
6 citations
TL;DR: Blends of polychloroprene rubber and plasticized polyvinylchloride have been prepared in various compositions and their properties evaluated as mentioned in this paper, showing that they can be used to replace polychloropsrene in many applications.
Abstract: Blends of polychloroprene rubber and plasticized polyvinylchloride have been prepared in various compositions and their properties evaluated. The properties of the blends show that they can be used to replace polychloroprene in many applications.
Aus Polychloropren und Polyvinylchlorid wurden Blends in verschiedenen Zusammensetzungen hergestellt und ihre Eigenschaften bestimmt. Die Eigenschaften der Blends zeigen, das sie Polychloropren in vielen Anwendungen ersetzen konnen.
5 citations
TL;DR: In this paper, a simple microwave NDT technique for locating the exact position of a localized flaw or asymmetrical portion within a solid rocket propellant motor is presented, and sample observations and probable errors involved in the method are indicated.
Abstract: A simple microwave NDT technique for locating the exact position of a localized flaw or asymmetrical portion within a solid rocket propellant motor is presented. Sample observations and probable errors involved in the method are indicated.
3 citations
TL;DR: Couches minces permettant la protection de composants optiques lors de l'irradiation par faisceau laser.
Abstract: Couches minces permettant la protection de composants optiques lors de l'irradiation par faisceau laser
2 citations
TL;DR: In this article, the second-order field equations of the SU(2) Higgs model were studied and a new class of string solutions were obtained, where the tension is finite and scale-dependent and the strings are of minus one unit flux.
2 citations
15 Oct 1986
TL;DR: In this article, the vibrational overtone spectra of the liquid phase 1,2-dichloroethane and 1, 2-dibromomethane in the spectral regions of the CH stretching local mode overtones are reported.
Abstract: The vibrational overtone spectra of the liquid phase 1,2-dichloroethane and 1,2-dibromoethane in the spectral regions of the CH stretching local mode overtones corresponding to ΔυCH = 2 to ΔυCH = 5 are reported. The observed spectral features are assigned using the local mode model. Local mode frequencies ωCH and diagonal local model anharmonicities XCH are obtained from an analysis of the spectra. The local-local combinations observed are interpreted on the basis of a coupled CH oscillator model hamiltonian. Local-normal combinations show complex structures and their possible assignments are given.
2 citations
TL;DR: In this article, the decay times of green emissions at 522.7, 551.3, 549.6, 542.2, 540.9 and 533.5 nm from CaF 2 : Ho 3+ with concentration are studied at RT and LNT.
1 citations
Journal Article•
TL;DR: A new species of Caligus collected from Caranx sansun (Forskal) is desscribed in detail with illustrations.
Abstract: A new species of Caligus collected from Caranx sansun (Forskal) is desscribed in detail with illustrations
1 citations